58" TB is better???
Thread Starter
Cruising
Joined: Jul 2002
Posts: 13
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From: woodmere ny
58" TB is better???
I dont know why everyone is telling me to go with a 52" i spoke to a god friend of mine who is an awesome mechanic and he told me that obviously it is better to go with a bigger throttle body it is more flow and you can never get enough of that. Well i'm goin with a 58" edelbrock TB and then i'm gonna port match the manifold myself. To get some major HP i'll tell you guys the results when i'm done.
Le Mans Master
Joined: Apr 2000
Posts: 6,294
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From: Amateur driver on open course.
Re: 58" TB is better??? (blackonblackLT1)
58 MM TB is a waste of money on a bone stock engine. Even with the port-matching. With Cold Air Induction, and bigger exhaust, the 52 would be ok, and some even disagree with this, but 58 is not gonna help a stock motor.
Race Director
Joined: Aug 2000
Posts: 14,130
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Cruise-In II Veteran
Re: 58" TB is better??? (blackonblackLT1)
IMO,the stock TB is fine...a 52MM you may not even see any gains.
A 52MM or 58MM is only good for larger cubic inch motors like a 383 SR or 383 LT1 or larger or highly modded 350's.
I think 2 people on here with modded LT1's or an LT4 reported no real gains with a larger TB.
Save your money for cam,heads,and exhaust first.
:)
A 52MM or 58MM is only good for larger cubic inch motors like a 383 SR or 383 LT1 or larger or highly modded 350's.
I think 2 people on here with modded LT1's or an LT4 reported no real gains with a larger TB.
Save your money for cam,heads,and exhaust first.
:)
Burning Brakes
Joined: Jun 2001
Posts: 838
Likes: 2
From: Out by the bridge again, TampaBay
Re: 58" TB is better??? (blackonblackLT1)
Unless you're 383CI or larger it's totally unnecessary and I still think 58 is too big for that N/A. All you'll do is loose fine throttle resolution.
I'm running a open lid, K&N, stock throttle body, stock MAF, 30lb injectors and make 361RWHP. FWIW :chevy
I'm running a open lid, K&N, stock throttle body, stock MAF, 30lb injectors and make 361RWHP. FWIW :chevy
Le Mans Master
Joined: Dec 1999
Posts: 8,540
Likes: 1
From: And on the fifth day, subpoenas were served to Obama senior staff
Re: 58" TB is better??? (blackonblackLT1)
Here is an engine with a 48mm Corvette TB, why don't you ask your friend about this:
http://www.sallee-chevrolet.com/Chev...m_Jet_502.html
:D
http://www.sallee-chevrolet.com/Chev...m_Jet_502.html
:D
Burning Brakes
Joined: Apr 2001
Posts: 844
Likes: 3
From: Kennewick, Wa. USA
Re: 58" TB is better??? (blackonblackLT1)
These guys are all correct! A 58 is a waste of time and money unless you've got at least 383 ci, and highly modified or after market better breathing heads and modified exhaust. In the case of L-98's, you also need a better breathing plenum and runners. Save the $350 towards some other mods first! :yesnod:
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Re: 58" TB is better??? (blackonblackLT1)
awesome mechanic, maybe
knowledgable about Corvette engines and how to get the best performance, doubtful
A 52mm wont even help on a stock engine. 58mm is overkill. I may go with one of these after i get a 383 with Superram, but never before.
hell a bigger TB could kill your good idle on a stock engine
knowledgable about Corvette engines and how to get the best performance, doubtful
A 52mm wont even help on a stock engine. 58mm is overkill. I may go with one of these after i get a 383 with Superram, but never before.
hell a bigger TB could kill your good idle on a stock engine
Safety Car
Joined: Mar 2000
Posts: 3,620
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From: Hillsboro OR
Re: 58" TB is better??? (blackonblackLT1)
Lingenfelter says its worth some hp on a 383 motor but I doubt its more than 10 hp. You won't see any improvement on a stock 350. Keep in mind that it will change when the computer goes to fuel enrichment mode and there will be a lean spot when the throttle is opened quickly.
NASCAR is limited to a 390 cfm inlet restictor plate.
NASCAR is limited to a 390 cfm inlet restictor plate.